On 2/3/2022 12:26 AM, Dmitry Baryshkov wrote:
Both cmd and vid backends provide no atomic_check() callbacks and
useless mode_fixup() callbacks. Drop support for both of them.

Signed-off-by: Dmitry Baryshkov <dmitry.barysh...@linaro.org>

We can drop mode_fixup() but I am using atomic_check() for WB to validate whether the programmed FB exceeds WB limits OR the programmed mode. Hence without an alternative for that we cannot drop that

Please refer to dpu_encoder_phys_wb_atomic_check in https://patchwork.freedesktop.org/patch/472324/

---
  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c   | 39 +++++--------------
  .../gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h  |  8 ----
  .../drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c  | 10 -----
  .../drm/msm/disp/dpu1/dpu_encoder_phys_vid.c  | 14 -------
  4 files changed, 9 insertions(+), 62 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 4530549850f0..e1c43a0c0643 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -573,7 +573,6 @@ static int dpu_encoder_virt_atomic_check(
        struct drm_display_mode *adj_mode;
        struct msm_display_topology topology;
        struct dpu_global_state *global_state;
-       int i = 0;
        int ret = 0;
if (!drm_enc || !crtc_state || !conn_state) {
@@ -595,39 +594,19 @@ static int dpu_encoder_virt_atomic_check(
trace_dpu_enc_atomic_check(DRMID(drm_enc)); - /* perform atomic check on the first physical encoder (master) */
-       for (i = 0; i < dpu_enc->num_phys_encs; i++) {
-               struct dpu_encoder_phys *phys = dpu_enc->phys_encs[i];
-
-               if (phys->ops.atomic_check)
-                       ret = phys->ops.atomic_check(phys, crtc_state,
-                                       conn_state);
-               else if (phys->ops.mode_fixup)
-                       if (!phys->ops.mode_fixup(phys, mode, adj_mode))
-                               ret = -EINVAL;
-
-               if (ret) {
-                       DPU_ERROR_ENC(dpu_enc,
-                                       "mode unsupported, phys idx %d\n", i);
-                       break;
-               }
-       }
-
        topology = dpu_encoder_get_topology(dpu_enc, dpu_kms, adj_mode);
/* Reserve dynamic resources now. */
-       if (!ret) {
-               /*
-                * Release and Allocate resources on every modeset
-                * Dont allocate when active is false.
-                */
-               if (drm_atomic_crtc_needs_modeset(crtc_state)) {
-                       dpu_rm_release(global_state, drm_enc);
+       /*
+        * Release and Allocate resources on every modeset
+        * Dont allocate when active is false.
+        */
+       if (drm_atomic_crtc_needs_modeset(crtc_state)) {
+               dpu_rm_release(global_state, drm_enc);
- if (!crtc_state->active_changed || crtc_state->active)
-                               ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
-                                               drm_enc, crtc_state, topology);
-               }
+               if (!crtc_state->active_changed || crtc_state->active)
+                       ret = dpu_rm_reserve(&dpu_kms->rm, global_state,
+                                       drm_enc, crtc_state, topology);
        }
trace_dpu_enc_atomic_check_flags(DRMID(drm_enc), adj_mode->flags);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
index e7270eb6b84b..159deb8ed7fb 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
@@ -84,12 +84,10 @@ struct dpu_encoder_virt_ops {
   * @is_master:                        Whether this phys_enc is the current 
master
   *                            encoder. Can be switched at enable time. Based
   *                            on split_role and current mode (CMD/VID).
- * @mode_fixup:                        DRM Call. Fixup a DRM mode.
   * @mode_set:                 DRM Call. Set a DRM mode.
   *                            This likely caches the mode, for use at enable.
   * @enable:                   DRM Call. Enable a DRM mode.
   * @disable:                  DRM Call. Disable mode.
- * @atomic_check:              DRM Call. Atomic check new DRM state.
   * @destroy:                  DRM Call. Destroy and release resources.
   * @get_hw_resources:         Populate the structure with the hardware
   *                            resources that this phys_enc is using.
@@ -117,17 +115,11 @@ struct dpu_encoder_phys_ops {
                        struct dentry *debugfs_root);
        void (*prepare_commit)(struct dpu_encoder_phys *encoder);
        bool (*is_master)(struct dpu_encoder_phys *encoder);
-       bool (*mode_fixup)(struct dpu_encoder_phys *encoder,
-                       const struct drm_display_mode *mode,
-                       struct drm_display_mode *adjusted_mode);
        void (*mode_set)(struct dpu_encoder_phys *encoder,
                        struct drm_display_mode *mode,
                        struct drm_display_mode *adjusted_mode);
        void (*enable)(struct dpu_encoder_phys *encoder);
        void (*disable)(struct dpu_encoder_phys *encoder);
-       int (*atomic_check)(struct dpu_encoder_phys *encoder,
-                           struct drm_crtc_state *crtc_state,
-                           struct drm_connector_state *conn_state);
        void (*destroy)(struct dpu_encoder_phys *encoder);
        void (*get_hw_resources)(struct dpu_encoder_phys *encoder,
                                 struct dpu_encoder_hw_resources *hw_res);
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
index 34a6940d12c5..45fe97fb612d 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
@@ -45,15 +45,6 @@ static bool dpu_encoder_phys_cmd_is_master(struct 
dpu_encoder_phys *phys_enc)
        return (phys_enc->split_role != ENC_ROLE_SLAVE);
  }
-static bool dpu_encoder_phys_cmd_mode_fixup(
-               struct dpu_encoder_phys *phys_enc,
-               const struct drm_display_mode *mode,
-               struct drm_display_mode *adj_mode)
-{
-       DPU_DEBUG_CMDENC(to_dpu_encoder_phys_cmd(phys_enc), "\n");
-       return true;
-}
-
  static void _dpu_encoder_phys_cmd_update_intf_cfg(
                struct dpu_encoder_phys *phys_enc)
  {
@@ -732,7 +723,6 @@ static void dpu_encoder_phys_cmd_init_ops(
        ops->prepare_commit = dpu_encoder_phys_cmd_prepare_commit;
        ops->is_master = dpu_encoder_phys_cmd_is_master;
        ops->mode_set = dpu_encoder_phys_cmd_mode_set;
-       ops->mode_fixup = dpu_encoder_phys_cmd_mode_fixup;
        ops->enable = dpu_encoder_phys_cmd_enable;
        ops->disable = dpu_encoder_phys_cmd_disable;
        ops->destroy = dpu_encoder_phys_cmd_destroy;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
index ddd9d89cd456..1831fe37c88c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
@@ -225,19 +225,6 @@ static void programmable_fetch_config(struct 
dpu_encoder_phys *phys_enc,
        spin_unlock_irqrestore(phys_enc->enc_spinlock, lock_flags);
  }
-static bool dpu_encoder_phys_vid_mode_fixup(
-               struct dpu_encoder_phys *phys_enc,
-               const struct drm_display_mode *mode,
-               struct drm_display_mode *adj_mode)
-{
-       DPU_DEBUG_VIDENC(phys_enc, "\n");
-
-       /*
-        * Modifying mode has consequences when the mode comes back to us
-        */
-       return true;
-}
-
  static void dpu_encoder_phys_vid_setup_timing_engine(
                struct dpu_encoder_phys *phys_enc)
  {
@@ -676,7 +663,6 @@ static void dpu_encoder_phys_vid_init_ops(struct 
dpu_encoder_phys_ops *ops)
  {
        ops->is_master = dpu_encoder_phys_vid_is_master;
        ops->mode_set = dpu_encoder_phys_vid_mode_set;
-       ops->mode_fixup = dpu_encoder_phys_vid_mode_fixup;
        ops->enable = dpu_encoder_phys_vid_enable;
        ops->disable = dpu_encoder_phys_vid_disable;
        ops->destroy = dpu_encoder_phys_vid_destroy;

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